#显示得分
import pygame.font
from pygame.sprite import Group

from ship import Ship

#显示得分信息
class Scoreboard:
    def __init__(self, ai_game):
        #初始化得分属性
        self.ai_game = ai_game
        self.screen = ai_game.screen
        self.screen_rect = self.screen.get_rect()
        self.settings = ai_game.settings
        self.stats = ai_game.stats

        #字体设置
        self.text_color = (30, 30, 30)
        self.font = pygame.font.SysFont(None, 48)
        
        self.prep_score()
        self.prep_high_score()
        self.prep_level()
        self.prep_ships()

    #将得分转换为一幅渲染的图像
    def prep_score(self):
        #将得分渲染为图像
        rounded_score = round(self.stats.score, -1) #参舍入到最近的 10 的整数倍
        score_str = f"{rounded_score:,}" #在数值的合适位置插入逗号
        self.score_image = self.font.render(score_str, True,
                                            self.text_color,
                                            self.settings.bg_color)
        #在屏幕右上角显示得分
        self.score_rect = self.score_image.get_rect()
        self.score_rect.right = self.screen_rect.right - 20
        self.score_rect.top = 20
        
    
    #将最高分渲染为图像
    def prep_high_score(self):
        high_score = round(self.stats.high_score, -1)
        high_score_str = f"{high_score:,}"
        self.high_score_image = self.font.render(high_score_str, True,
                                                 self.text_color,
                                                 self.settings.bg_color)
        
        #将最高分放在屏幕顶部中央
        self.high_score_rect = self.high_score_image.get_rect()
        self.high_score_rect.centerx = self.screen_rect.centerx
        self.high_score_rect.top = self.score_rect.top
        
    
    #将等级渲染为图像
    def prep_level(self):
        level_str = str(self.stats.level)
        self.level_image = self.font.render(level_str, True,
                                            self.text_color,
                                            self.settings.bg_color)
        
        #将等级放在得分下方
        self.level_rect = self.level_image.get_rect()
        self.level_rect.right = self.score_rect.right
        self.level_rect.top = self.score_rect.bottom + 10
    
    
    #绘制图片
    def show_score(self):
        self.screen.blit(self.score_image, self.score_rect)
        self.screen.blit(self.high_score_image, self.high_score_rect)
        self.screen.blit(self.level_image, self.level_rect)
        self.ships.draw(self.screen)
        
    
    #检查是否诞生了新的最高分
    def check_high_score(self):
        if self.stats.score > self.stats.high_score:
            self.stats.high_score = self.stats.score
            self.prep_high_score()
            
    
    #显示剩余飞船
    def prep_ships(self):
        self.ships = Group()
        for ship_number in range(self.stats.ships_left):
            ship = Ship(self.ai_game)
            ship.rect.x = 10 + ship_number * ship.rect.width
            ship.rect.y = 10
            self.ships.add(ship)
            
